Name resolution not working for jailkit chrooted users

I followed the "Perfect Server" installation for Ubuntu 11.04 and ISPConfig 3.
When using shell as generic linux user or sudo, name resolution works perfectly.

Inside a chrooted environment, name resolution fails.

Here's what I did:

I created a client, and a site. (No reseller is used in my case).
I gave the client a chrooted shell.
The client user can login to the shell, but cannot get name resolution from the shell using any of the available tools:

(NOTE: The location of these files may vary depending upon your distribution, but the names of the libraries will be the same. You can use strace with ping to find out where it's looking for them.)

There are a lot of useful command line tools that are missing from the default client jail, such as ping, wget, dig, nslookup, etc. Not sure why these were left out. Maybe I did something wrong during the installation.